What is the mean of the data t, 2t – 1, t – 2, 2t -1, 4t and 2t + 2?
Source: JAMB · 2024
What is the mean of the data t, 2t – 1, t – 2, 2t -1, 4t and 2t + 2?
Explanation
Add all six terms: t + (2t – 1) + (t – 2) + (2t – 1) + 4t + (2t + 2).
The t terms give 12t. The numbers give -1 – 2 – 1 + 2 = -2. So the sum is 12t – 2.
Mean = sum ÷ number of terms = (12t – 2)/6 = 2t – 1/3.
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